attribute vec4 aPosition;
attribute vec2 aCoordinate;
attribute vec4 aColor;

uniform mat4 u_ProjMatrix;
uniform mat4 u_ModelMatrix;

varying vec2 vCoordinate;
varying vec4 vColor;

void main() {
    gl_Position = u_ProjMatrix * u_ModelMatrix * aPosition;
    vCoordinate = aCoordinate;
    vColor = aColor;
}